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EP 3 512 992 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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09.09.2020 Bulletin 2020/37 |
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Date of filing: 12.09.2017 |
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International Patent Classification (IPC):
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International application number: |
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PCT/IT2017/000191 |
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International publication number: |
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WO 2018/051378 (22.03.2018 Gazette 2018/12) |
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CONTROL SYSTEM FOR WEAVING LOOMS AND DEEP LEARNING METHOD
STEUERUNGSSYSTEM FÜR WEBMASCHINEN UND TIEFENLERNVERFAHREN
SYSTÈME DE COMMANDE POUR MÉTIERS À TISSER ET PROCÉDÉ D'APPRENTISSAGE PROFOND
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Designated Contracting States: |
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AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL
NO PL PT RO RS SE SI SK SM TR |
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Priority: |
13.09.2016 IT 201600092046
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Date of publication of application: |
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24.07.2019 Bulletin 2019/30 |
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Proprietor: Santex Rimar Group S.r.l. |
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36070 Trissino VI (IT) |
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Inventor: |
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- CORAIN, Luciano
36070 Trissino VI (IT)
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Representative: Mitola, Marco |
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Jacobacci & Partners S.p.A.
Piazza Mario Saggin, 2 35131 Padova 35131 Padova (IT) |
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References cited: :
DE-A1-102007 020 907 JP-A- H04 214 446
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DE-U1- 20 021 049 JP-A- H05 272 037
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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[0001] This invention relates to a control system for looms for warp and weft weaving, in
particular, for rapier type looms in which the shedding machine and the weaving machine
each actuate relative devices the phasing of which must be suitably coordinated and
in such a way as to avoid interferences and safeguard the mechanical condition of
moving parts; the phasing between the two parts has operational margins within which
the mutual position may be varied in order to optimize the operation of the loom.
[0002] More specifically, the invention relates to an integrated command and/or control
system for the individual actuation of the shedding machine and the weaving machine
which together constitute a loom suitable for carrying out the cycle for inserting
the weft, which, when repeated in sequence, forms the fabric in the loom.
[0003] Types of warp and weft threads, warp/weft weave, fabric coverage factor and width
of fabric are some of the characteristics which require specific adjustments of the
machine in order to optimize the productivity and the quality in each application.
[0004] However, these adjustments must be carried out with the machine stopped, either before
the start up by interrupting the operation of the machine during a work cycle, with
a resulting waste of time and resources which has an adverse effect on the weaving
costs.
[0005] According to prior art technology, the control of a weaving loom comprises one or
motors and a series of mechanisms which allow the following functions of the loom
to be performed:
- controlling the steady-state speed, with the possibility of selecting the value suitable
for the needs of the textile product being processed;
- connecting the machine and the shedding mechanism (dobby or Jacquard loom) according
to a phasing between the two parts which is suitable for the textile product being
processed;
- connecting the machine and shedding mechanism in reverse mode according to a phasing
similar to that of the arrangement in forward mode;
- varying the phasing between the loom and the shedding mechanism according to the technological
requirements of the fabric to be produced.
[0006] According to the prior art solutions, the control includes a pair of motors, of which
a first motor is used to control the machine at standard forward speed during operation,
a second motor is used for low speed reverse movement during the de-weaving phase,
and a toothed electromagnetic coupling with an engagement position, which ensures
a predetermined phasing between the machine and the shedding mechanism in both directions
of movement. The phasing during the forward and reverse movements can be modified
by intervening manually on the mechanical connections between the various parts of
the loom.
[0007] Another prior art solution comprises the use of a series of gears for controlling
the two parts of the frame (machine and shedding mechanism), which can be coupled
in various combinations by means of the axial sliding of one or more of the above-mentioned
gears on a dedicated shaft, and control devices for the correct coupling between the
gears.
[0008] A third solution of conventional type uses a transmission line comprising a brushless
motor, a flywheel, a brake/clutch and a mechanical control of the shedding machine
from the control shaft. The phasing between the machine and shedding mechanism is
fixed and can be varied manually by intervening on the mechanical parts. During reverse
movement the members for transporting the weft are disconnected from the rest of the
machine, which may be actuated with slow reverse movement for de-weaving.
[0009] A fourth prior art solution comprises the use of a main control motor connected to
parallel control shafts, of the machine and the shedding mechanism, respectively,
and the control shaft of the machine is connected to the machine and to the shedding
mechanism by means of a clutch and a series of position sensors for the phasing between
the two part of the loom. There is also an arrangement consisting of two gears, of
which the first gear is mounted on the shaft of the motor and the second gear is mounted
on a service shaft, coaxial to and aligned with the motor shaft and moved by the motor
shaft by means of an electromagnetic coupling.
[0011] The aim of this invention is to make a control system for rapier looms, which allows
the command and control of the individual actuation of various mechanisms which intervene
in the cycle for inserting the weft, with variable mutual phasing, according to the
technological needs of the weaving and the operational trend of the machine, with
the possibility of individual variation of the movement of each mechanism connected
to the control system and communication with other control systems in deep learning
mode, thereby simplifying and improving the above-mentioned adjustment requirements.
[0012] Another aim of the invention is to make a control system for weaving looms which
allows the weaving loom to learn, process and manage functional adjustments aimed
at varying the work conditions, on the basis of data relative to optimum operations
of the machine previously tested such as type of warp and tensions, type of weft and
tensions, weft-warp weave, opening of the warp shed and times, causes of machine stoppages
and relative stoppage times, work speed and variations during start-up and in operation,
quality of fabric, ambient conditions and every other element useful for the purposes
of the production efficiency of the machine and the quality of the fabric.
[0013] A further aim of the invention is to make a control system for weaving looms, as
well as an integrated control system for individual actuation of mechanisms for forming
the fabric, which is able to intervene with autonomous adjustments for each fabric
to be produced during start-up or during weaving.
[0014] These aims are achieved by making a control system for rapier looms according to
the appended claim 1.
[0015] Other technical features of the control system according to the invention are mentioned
in the subsequent claims.
[0016] Advantageously, the control system according to the invention uses a speed, position
and torque control motor, which actuate the forward movement during the weaving phase,
the reverse movement during the de-weaving phase and the slow movement during the
control and adjustment phase of the weaving loom.
[0017] In practice, the command actuates the two parts of the machine (weaving machine WM
which controls the shuttles for the transport of the weft and shedding mechanism SM
which commands the opening of the warp shed), which are suitably coordinated by the
actuation mechanisms.
[0018] Each of the above-mentioned parts includes a position transducer device, which is
able to continuously send signals relative its position and its operational status
to a central control system for the processing to be performed and the functional
interventions to be carried out.
[0019] The control system collects operational data of the loom, such as the number and
type of stops, the weaving speed, the discontinuity and/or quality of the fabric,
etc., compares the data with a database inserted in a central logic, which contains
the characteristics of the yarns and fabrics in production and the ambient conditions,
and decides autonomously in auto-learning mode whether it is worthwhile modifying
the operating parameters comprising the driving speed, the phasing between the weaving
machine and the shedding and any start ramp, which have been set at a start-up period,
and communicating with other control systems outside the machine in "Deep Learning"
mode.
[0020] In the new work conditions, the functional data is compared by a central control
system with the previous data and the theoretical data and the control system decides
whether it is worthwhile carrying out any further adjustment to the machine set-up.
[0021] These checks and consequent adjustments occur independently within each individual
loom due to the effect of the measurement of operational data and the software processing
according to the "Deep Learning" technology, which, by means of a control system,
intervenes on the actuating motor or motors, on the connection between the various
parts of the loom on the basis of the data measured, such as number of stops per warp,
types and positions connected, number of stops per weft and types connected to the
functions of the shuttles and the individual colours in weft, as well as the causes
of machine stoppage and relative stoppage times, speed of work and variations during
start-up and in operation, quality of fabric, ambient conditions and every other element
considered useful for the purposes of the production efficiency and quality of the
machine.
[0022] Further characteristics and advantages of a control system for weaving looms according
to the invention will more fully emerge from the description that follows and from
the appended drawings, provided by way of example but without limiting the scope of
the invention, in which:
- Figure 1 shows a block diagram of a first embodiment of a control system for weaving
looms according to the invention;
- Figure 2 shows a block diagram of an alternative embodiment of a control system for
weaving looms according to the invention.
[0023] With particular reference to Figure 1, a first embodiment of the control system for
weaving looms, according to the invention, comprises a device for actuating the weaving
machine (WM) 8 and the shedding mechanism (SM) 7, which includes a motor 1 with a
single control shaft 2, on which are mounted the gears 3, 4 for the control, by means
of respective control shafts, of the weaving machine 8 and the shedding mechanism
7, and a frontal electromechanical coupling, comprising toothed portions 5, 6, which
are connected, respectively and by means of respective control shafts, on one side,
to the gear 3 and, on the other side, to the weaving machine 8. The toothed portions
5, 6 can interface and connect according to the signals coming from the control system
C.
[0024] The phasing between the weaving machine 8 and the shedding mechanism 7 is implemented
by actuating the position coupling, with front gears, comprising the two portions
5 and 6, which are switched on or off following an electrical command coming from
the control system C.
[0025] The control system C in turn receives the control signals transmitted by the parts
7 and 8 (weaving machine and shedding mechanism), which constitute the weaving loom,
by means of transducer devices for the continuous position signalling, whilst a parking
brake 9 intervenes during the phasing adjustments to ensure the precision of mutual
positioning between the weaving machine 8 and the shedding mechanism 7.
[0026] In practice, each of the two parts (weaving machine 8 and shedding machine 7) send
signals throughout the whole 360° arc with a resolution of 360°/2
12 (or any greater precision, if necessary), so as to control every moment of the whole
weaving or weft insertion cycle and to adopt phasing positions between the two parts
controlled (weaving machine 8 and shedding machine 7) as a function of the technological
needs of the fabric being produced.
[0027] The variation of the phasing can take place independently, when a stop for weft or
warp occurs, or with an stop operated by the control system C, whilst the other types
of work parameters can be modified with the machine working.
[0028] A further embodiment of the control system for weaving looms, according to the invention,
which allows the operational weaving parameters to be modified in auto-learning mode,
comprises the use of independent actuators comprising pitch control motors M1, M2,
which actuate, respectively, the weaving machine 8 and the shedding mechanism 7, which
are in turn controlled by a control system C, which determines the speed and phasing
in every moment of the weaving cycle or weft insertion cycle (Fig. 2).
[0029] In this case, all the adjustments of all the operational parameters for machine adjustment
relative both to the weaving machine 8 and the shedding mechanism 7 can be carried
out according to the movement order.
[0030] From the description, the characteristics of the control system for weaving looms,
according to this invention, clearly emerge, as do the advantages thereof.
[0031] More specifically, the system according to the invention is able to measure and modify
the phasing and the adjustments of the parts (weaving machine and shedding mechanism)
which make up the loom, intervening automatically in auto-learning mode according
to the operational data recorded with the machine in operation, compared with equivalent
theoretical data entered in a central control system, as well as with data of other
control systems with which the central control system is able to communicate.
[0032] On the other hand, the central control system optimizes, with suitable adjustment
modifications, the productivity and the quality of the fabric being produced, implementing
suitable interventions by means of modifications of the adjustments of a motor and
a position electromechanical coupling or of two motor which actuate, respectively,
the weaving machine and the shedding mechanism.
[0033] Lastly, it is clear that numerous other variants might be made to the control system
in question, without forsaking the principles of novelty of the inventive idea, while
it is clear that in the practical actuation of the invention, the materials, the shapes
and the dimensions of the illustrated details can be of any type according to requirements,
and can be replaced by other technically equivalent elements.
1. A control system for rapier looms, comprising at least a motor (1; M1, M2) for actuating
a weaving machine (8) and a shedding machine (7), wherein the weaving machine (8)
and the shedding machine (7) each actuate respective devices which constitute moving
parts the timing of which is coordinated and controlled in such a way as to avoid
interferences and safeguard the mechanical condition of the parts, wherein the weaving
machine (8) and the shedding machine (7) include a respective device for sending continuous
signals relating to the respective position and operational status to a control system
(C), so that the control system (C) is able to collect and process the operating data
of a loom, such as the number and type of stops, the weaving speed, any discontinuities
and/or quality of the fabric, to compare said operating data with a database containing
theoretical operating data based on the features of the yarns and fabrics in production,
to communicate with other control systems and to decide autonomously, according to
a Deep Learning mode, whether to modify the loom working parameters comprising the
driving speed, the phasing between the weaving machine (8) and the shedding machine
(7) and the start ramp which have been set at a start-up period, said operating data
of the loom being compared with previous data and with said theoretical operating
data and with other data coming from said other control systems with which the control
system (C) communicates, so that the control system (C) is able to decide whether
to make further changes to said loom working parameters.
2. The control system according to claim 1, characterized in that said at least a motor (1; M1, M2) is constituted by a speed, position and torque
control motor, which actuates the forward movement during a weaving phase, the reverse
movement during the de-weaving phase and the slow movement during the control and
adjustment phase of the loom.
3. The control system according to any one of the preceding claims, characterized in that said at least a motor (1) has a single control shaft (2), on which are mounted a
first gear (3) and a second gear (4) for the control, respectively and through respective
shafts, of the weaving machine (8) and the shedding machine (7), and a position electromechanical
coupling constituted by toothed portions (5, 6) which are connected, via respective
drive shafts, on one side, to the first gear (3) and, on the other side, to the weaving
machine (8), the toothed portions (5, 6) being designed to interface and connect between
them according to signals coming from the control system (C), so that the phasing
operations between the weaving machine (8) and the shedding machine (7) are implemented
by actuating the position electromechanical coupling, which is switched on or off
as a result of a command coming from the control system (C), which, in turn, receives
the position signals transmitted continuously from the weaving machine (8) and from
the shedding machine (7).
4. The control system according to claim 3, characterized in that a parking brake (9) is inserted during the phasing operations to ensure the precision
of the mutual positioning between the weaving machine (8) and the shedding machine
(7).
5. The control system according to any one of the preceding claims, characterized in that the weaving machine (8) and the shedding machine (7) send signals throughout the
whole 360° arc, so as to control every moment of the whole weaving or weft insertion
cycle and to adopt phasing positions between the weaving machine (8) and the shedding
machine (7) as a function of the technological needs of the fabric produced.
6. The control system according to any one of claims 3 to 5, characterized in that the phasing operations take place independently, when a stop for weft or warp occurs,
or with an autonomous stop operated by the control system (C).
7. The control system according to claim 1, characterized in that said at least a motor (1; M1, M2) is constituted by pitch control motors, which are
configured to actuate, independently, the weaving machine (8) and the shedding machine
(7), which are in turn controlled by the control system (C), which determines speed
and phasing in each weaving or weft insertion cycle.
8. The control system according to claim 7, characterized in that all adjustments of all the operating parameters both of the weaving machine (8) and
of the shedding machine (7) are carried out according to the movement order.
1. Ein Steuersystem für Greiferwebmaschinen, das mindestens einen Motor (1; M1, M2) zum
Betätigen einer Webmaschine (8) und einer Fachbildemaschine (7), wobei die Webmaschine
(8) und die Fachbildemaschine (7) jeweils entsprechende Vorrichtungen betätigen, die
bewegliche Teile bilden, deren Timing so koordiniert und gesteuert wird, dass Störungen
vermieden und der mechanische Zustand der Teile gesichert wird, wobei die Webmaschine
(8) und die Fachbildemaschine (7) eine Einrichtung zum Senden von kontinuierlichen
Signalen, die sich auf die jeweilige Position und den Betriebszustand beziehen, an
ein Steuersystem (C) enthalten, so dass das Steuersystem (C) in der Lage ist, die
Betriebsdaten eines Webstuhls, wie die Anzahl und die Art der Stopps, die Webgeschwindigkeit,
jegliche Diskontinuitäten und/oder die Qualität des Gewebes, zu sammeln und zu verarbeiten,
die genannten Betriebsdaten mit einer Datenbank zu vergleichen, die theoretische Betriebsdaten
enthält, die auf den Merkmalen der in Produktion befindlichen Garne und Gewebe basieren,
mit anderen Steuerungssystemen zu kommunizieren und gemäß einem Modus für tiefes Lernen
(Deep Learning) autonom zu entscheiden, ob die Arbeitsparameter der Webmaschine, die
die Antriebsgeschwindigkeit, die Phase zwischen der Webmaschine (8) und der Fachbildemaschine
(7) und die Startrampe, die in einer Anfahrperiode eingestellt worden sind, umfassen,
geändert werden sollen, wobei die Betriebsdaten der Webmaschine mit früheren Daten
und mit den theoretischen Betriebsdaten und mit anderen Daten, die von den anderen
Steuersystemen kommen, mit denen das Steuersystem (C) kommuniziert, verglichen werden,
so dass das Steuersystem (C) in der Lage ist, zu entscheiden, ob weitere Änderungen
an den Arbeitsparametern der Webmaschine vorgenommen werden sollen.
2. Das Steuersystem nach Anspruch 1, dadurch gekennzeichnet, dass der mindestens eine Motor (1; M1, M2) durch einen Motor zur Geschwindigkeits-, Positions-
und Drehmomentsteuerung gebildet wird, der die Vorwärtsbewegung während einer Webphase,
die Rückwärtsbewegung während der Entwebungsphase und die langsame Bewegung während
der Steuer- und Einstellphase der Webmaschine betätigt.
3. Das Steuersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der mindestens eine Motor (1) eine einzige Steuerwelle (2) aufweist, auf der ein
erstes Zahnrad (3) und ein zweites Zahnrad (4) für die Steuerung jeweils und durch
entsprechende Wellen montiert sind, der Webmaschine (8) und der Fachbildemaschine
(7) und eine elektromechanische Positionskupplung, die aus gezahnten Abschnitten (5,
6) besteht, die über jeweilige Antriebswellen auf einer Seite mit dem ersten Zahnrad
(3) und auf der anderen Seite mit der Webmaschine (8) verbunden sind, wobei die gezahnten
Abschnitte (5, 6) so ausgelegt sind, dass sie in Abhängigkeit von Signalen, die von
dem Steuersystem (C) kommen, miteinander gekoppelt und verbunden werden, so dass die
Phaseneinstellvorgänge zwischen der Webmaschine (8) und der Fachbildemaschine (7)
durch Betätigung der elektromechanischen Positionskopplung realisiert werden, die
infolge eines Befehls, der von dem Steuersystem (C) kommt, das seinerseits die Positionssignale
empfängt, die kontinuierlich von der Webmaschine (8) und von der Fachbildemaschine
(7) übertragen werden, ein- oder ausgeschaltet wird.
4. Steuersystem nach Anspruch 3, dadurch gekennzeichnet, dass eine Feststellbremse (9) während der Phaseneinstellvorgänge eingesetzt wird, um die
Präzision der gegenseitigen Positionierung zwischen der Webmaschine (8) und der Fachbildemaschine
(7) zu gewährleisten.
5. Steuersystem nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Webmaschine (8) und die Fachbildemaschine (7) Signale über den gesamten 360°-Bogen
senden, um jeden Moment des gesamten Web- oder Schussfadeneintragszyklus zu steuern
und Phasenpositionen zwischen der Webmaschine (8) und der Fachbildemaschine (7) in
Abhängigkeit von den technologischen Erfordernissen des hergestellten Gewebes einzunehmen.
6. Steuersystem nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass die Phaseneinstellvorgänge unabhängig voneinander stattfinden, wenn ein Halt eines
Schuss- oder Kettfadens auftritt, oder bei einem autonomen Stopp, der von dem Steuersystem
(C) herbeigeführt wird.
7. Steuersystem nach Anspruch 1, dadurch gekennzeichnet, dass der mindestens eine Motor (1; M1, M2) durch Höhensteuermotoren gebildet wird, die
so konfiguriert sind, dass sie unabhängig die Webmaschine (8) und die Fachbildemaschine
(7) betätigen, die wiederum durch das Steuersystem (C) gesteuert werden, das die Geschwindigkeit
und die Phasenlage in jedem Web- oder Schusseintragszyklus bestimmt.
8. Das Steuerungssystem nach Anspruch 7, dadurch gekennzeichnet, dass alle Einstellungen aller Betriebsparameter sowohl der Webmaschine (8) als auch der
Fachbildemaschine (7) entsprechend der Bewegungsreihenfolge durchgeführt werden.
1. Système de commande pour métiers à tisser à pinces, comprenant au moins un moteur
(1 ; M1, M2) permettant d'actionner une machine à tisser (8) et une machine de formation
de la foule (7), dans lequel la machine à tisser (8) et la machine de formation de
la foule (7) actionnent chacune des dispositifs respectifs qui constituent des pièces
mobiles dont le minutage est coordonné et commandé de manière à éviter des interférences
et à sauvegarder la condition mécanique des pièces, dans lequel la machine à tisser
(8) et la machine de formation de la foule (7) comportent un dispositif respectif
permettant d'envoyer des signaux continus concernant la position respective et l'état
fonctionnel à un système de commande (C), de sorte que le système de commande (C)
soit capable de recueillir et traiter les données fonctionnelles d'un métier à tisser,
telles que le nombre et le type d'arrêts, la vitesse de tissage, toute interruption
et/ou qualité de l'étoffe, de comparer lesdites données fonctionnelles à une base
de données contenant des données fonctionnelles théoriques d'après les caractéristiques
des fils et des étoffes en production, de communiquer avec d'autres systèmes de commande
et de décider de façon autonome, selon un mode d'apprentissage profond, s'il faut
modifier ou non les paramètres de fonctionnement de métier à tisser comprenant la
vitesse d'entraînement, la mise en phase entre la machine à tisser (8) et la machine
de formation de la foule (7) et la rampe de démarrage qui ont été réglés à une période
de démarrage, lesdites données fonctionnelles du métier à tisser étant comparées à
des données précédentes et auxdites données fonctionnelles théoriques et à d'autres
données provenant desdits autres systèmes de commande avec lesquels le système de
commande (C) communique, de sorte que le système de commande (C) soit capable de décider
s'il faut apporter ou non des changements supplémentaires auxdits paramètres de fonctionnement
de métier à tisser.
2. Système de commande selon la revendication 1, caractérisé en ce que ledit au moins un moteur (1 ; M1, M2) est constitué d'un moteur de commande de vitesse,
de position et de couple, qui actionne le mouvement vers l'avant pendant une phase
de tissage, le mouvement inverse pendant la phase de détissage et le mouvement lent
pendant la phase de commande et d'ajustement du métier à tisser.
3. Système de commande selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit au moins un moteur (1) possède un arbre de commande (2) unique, sur lequel
sont montés un premier engrenage (3) et un second engrenage (4) pour la commande,
respectivement, et par le biais d'arbres respectifs, de la machine à tisser (8) et
de la machine de formation de la foule (7), et un couplage électromécanique de position
constitué de portions dentées (5, 6) qui sont raccordées, via des arbres d'entraînement
respectifs, sur un côté, au premier engrenage (3) et, sur l'autre côté, à la machine
à tisser (8), les portions dentées (5, 6) étant conçues pour servir d'interface et
se raccorder entre elles selon des signaux provenant du système de commande (C) de
sorte que les opérations de mise en phase entre la machine à tisser (8) et la machine
de formation de la foule (7) soient implémentées en actionnant le couplage électromécanique
de position, qui est mis sous tension ou hors tension suite à un ordre provenant du
système de commande (C) qui, à son tour, reçoit les signaux de position transmis en
continu depuis la machine à tisser (8) et depuis la machine de formation de la foule
(7).
4. Système de commande selon la revendication 3, caractérisé en ce qu'un frein d'immobilisation (9) est inséré pendant les opérations de mise en phase pour
garantir la précision du positionnement mutuel entre la machine à tisser (8) et la
machine de formation de la foule (7).
5. Système de commande selon l'une quelconque des revendications précédentes, caractérisé en ce que la machine à tisser (8) et la machine de formation de la foule (7) envoient des signaux
sur tout l'arc de 360°, de façon à commander chaque moment du cycle entier d'insertion
de fil de trame ou de tissage et à adopter des positions de mise en phase entre la
machine à tisser (8) et la machine de formation de la foule (7) en fonction des besoins
technologiques de l'étoffe produite.
6. Système de commande selon l'une quelconque des revendications 3 à 5, caractérisé en ce que les opérations de mise en phase se produisent indépendamment, lorsqu'un arrêt des
fils de trame ou des fils de chaîne a lieu, ou avec un arrêt autonome mis en œuvre
par le système de commande (C).
7. Système de commande selon la revendication 1, caractérisé en ce que ledit au moins moteur (1 ; M1, M2) est constitué de moteurs de commande de pas, qui
sont conçus pour actionner, indépendamment, la machine à tisser (8) et la machine
de formation de la foule (7), qui sont à leur tour commandées par le système de commande
(C), qui détermine une vitesse et une mise en phase dans chaque cycle d'insertion
de fil de trame ou de tissage.
8. Système de commande selon la revendication 7, caractérisé en ce que tous les ajustements de tous les paramètres fonctionnels à la fois de la machine
à tisser (8) et de la machine de formation de la foule (7) sont réalisés selon l'ordre
de mouvement.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description